Eur. Phys. J. A (2010) 43: 351-368
https://doi.org/10.1140/epja/i2010-10923-1

Regular Article - Theoretical Physics

Polarized pK^- scattering in Unitary Baryon Chiral Perturbation Theory

Departamento de Física Aplicada, CINVESTAV-IPN, Carretera Antigua a Progreso Km. 6, Apdo. Postal 73 “Cordemex”, 97310, Mérida, Yucatán, Mexico

^* e-mail: abouzas@mda.cinvestav.mx

Received: 10 November 2009
Revised: 22 December 2009
Accepted: 12 January 2010
Published online: 18 February 2010

Abstract

We study pK^- scattering in the energy range from threshold through the (1520) peak in UBChPT, taking into account O(q) vertices from meson-baryon contact interactions and s - and u -channel ground-state baryon exchange, s - and u -channel decuplet- and nonet-baryon exchange and t -channel vector-meson exchange, as well as O(q ²) flavor-breaking vertices. Detailed fits to data are presented, including a substantial body of differential cross-section data with meson momentum q _lab > 300 MeV not considered in previous treatments.